During June 2025, J. Westfall focused on improving arcade emulation accuracy in the mamedev/mame repository by addressing a critical sprite rendering bug affecting k007121-based games. Using C++ and leveraging skills in low-level programming and reverse engineering, Westfall enforced a 264 8x8 sprite block limit and removed sprite RAM buffering, which resolved issues with missing or leftover sprites. The work included refactoring the sprite bank selection logic into k007121.cpp to enhance maintainability and reduce cross-module dependencies. Updated in-code documentation clarified the redesign, resulting in improved game compatibility and visual correctness for affected titles, demonstrating depth in emulation problem-solving.